英文:
Golang template - how to render templates?
问题
一个包含三个子模板的布局模板。
layout.html
<html>
<body>
{{template "tags"}}
{{template "content"}}
{{template "comment"}}
</body>
</html>
tags.html
{{define "tags"}}
<div>
{{.Name}}
<div>
{{end}}
content.html
{{define "content"}}
<div>
<p>{{.Title}}</p>
<p>{{.Content}}</p>
</div>
{{end}}
comment.html
{{define "tags"}}
<div>
{{.Note}}
</div>
{{end}}
##gocode
type Tags struct {
Id int
Name string
}
type Content struct {
Id int
Title string
Content string
}
type Comment struct {
Id int
Note string
}
func main() {
tags := &Tags{"Id":1, "Name":"golang"}
Content := &Content{"Id":9, "Title":"Hello", "Content":"World!"}
Comment := &Comment{"Id":2, "Note":"Good Day!"}
}
我不确定如何渲染每个子模板并将结果组合到布局输出中。
谢谢。
英文:
One layout template with three children templates.
layout.html
<html>
<body>
{{template "tags"}}
{{template "content"}}
{{template "comment"}}
</body>
</html>
tags.html
{{define "tags"}}
<div>
{{.Name}}
<div>
{{end}}
content.html
{{define "content"}}
<div>
<p>{{.Title}}</p>
<p>{{.Content}}</p>
</div>
{{end}}
comment.html
{{define "tags"}}
<div>
{{.Note}}
</div>
{{end}}
##gocode
type Tags struct {
Id int
Name string
}
type Content struct {
Id int
Title string
Content string
}
type Comment struct {
Id int
Note string
}
func main() {
tags := &Tags{"Id":1, "Name":"golang"}
Content := &Content{"Id":9, "Title":"Hello", "Content":"World!"}
Comment := &Comment{"Id":2, "Note":"Good Day!"}
}
I am confused that how to render each children template and combine the result to layout output.
Thanks.
答案1
得分: 26
如往常一样，文档是一个很好的起点。
我在游乐场上写了一个可工作的示例。
简要解释一下：
- 在结构体字面量中不需要使用字符串：
&Tags{Id: 1}，而不是&Tags{"Id":1} - 你只能传递一个对象给模板执行，它会根据你在
{{template <name> <arg>}}指令中的要求将对象分派给每个子模板。我使用了一个临时的Page结构体，但如果你喜欢的话，也可以使用map[string]interface{}。 - 你需要解析每个模板（我在游乐场上使用了字符串，但如果你已经有了HTML文件，可以使用ParseFiles）
- 我使用了
os.Stdout来执行它，但你显然应该将其替换为相应的ResponseWriter
以下是完整的代码：
package main
import "fmt"
import "html/template"
import "os"
var page = `<html>
<body>
{{template "tags" .Tags}}
{{template "content" .Content}}
{{template "comment" .Comment}}
</body>
</html>`
var tags = `{{define "tags"}}
<div>
{{.Name}}
<div>
{{end}}`
var content = `{{define "content"}}
<div>
<p>{{.Title}}</p>
<p>{{.Content}}</p>
</div>
{{end}}`
var comment = `{{define "comment"}}
<div>
{{.Note}}
</div>
{{end}}`
type Tags struct {
Id int
Name string
}
type Content struct {
Id int
Title string
Content string
}
type Comment struct {
Id int
Note string
}
type Page struct {
Tags *Tags
Content *Content
Comment *Comment
}
func main() {
pagedata := &Page{
Tags: &Tags{Id: 1, Name: "golang"},
Content: &Content{Id: 9, Title: "Hello", Content: "World!"},
Comment: &Comment{Id: 2, Note: "Good Day!"},
}
tmpl := template.New("page")
var err error
if tmpl, err = tmpl.Parse(page); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(tags); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(comment); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(content); err != nil {
fmt.Println(err)
}
tmpl.Execute(os.Stdout, pagedata)
}
英文:
As always, the doc is a good place to start.
I wrote a working example on the playground
To explain a bit:
- You don't need strings in struct literals:
&Tags{Id: 1}, not&Tags{"Id":1} - You can only pass a single object to your template to execute, which will dispatch objects to each subtemplate as you require in the
{{template <name> <arg>}}instruction. I used a ad-hocPagestruct, but amap[string]interface{}would do if you prefer. - You need to parse each template (I used strings in the Playground, but ParseFiles would do if you have your html files already)
- I used os.Stdout to execute it, but you should obviously replace that by the corresponding
ResponseWriter
And the whole code:
package main
import "fmt"
import "html/template"
import "os"
var page = `<html>
<body>
{{template "tags" .Tags}}
{{template "content" .Content}}
{{template "comment" .Comment}}
</body>
</html>`
var tags = `{{define "tags"}}
<div>
{{.Name}}
<div>
{{end}}`
var content = `{{define "content"}}
<div>
<p>{{.Title}}</p>
<p>{{.Content}}</p>
</div>
{{end}}`
var comment = `{{define "comment"}}
<div>
{{.Note}}
</div>
{{end}}`
type Tags struct {
Id int
Name string
}
type Content struct {
Id int
Title string
Content string
}
type Comment struct {
Id int
Note string
}
type Page struct {
Tags *Tags
Content *Content
Comment *Comment
}
func main() {
pagedata := &Page{Tags:&Tags{Id:1, Name:"golang"},
Content: &Content{Id:9, Title:"Hello", Content:"World!"},
Comment: &Comment{Id:2, Note:"Good Day!"}}
tmpl := template.New("page")
var err error
if tmpl, err = tmpl.Parse(page); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(tags); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(comment); err != nil {
fmt.Println(err)
}
if tmpl, err = tmpl.Parse(content); err != nil {
fmt.Println(err)
}
tmpl.Execute(os.Stdout, pagedata)
}
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